Service difficulty report · Fmu · Boeing 777222

Difficulty date
May 6, 2026
Submitted
May 11, 2026
Operation
Air carrier
Aircraft
N794UA
Make and model
Boeing 777222
Aircraft serial
26953
Aircraft time
114,850 hours, 15,000 cycles
Engine
Pwa PW4090
Part
Fmu
Part number
8088001
Part serial
F61508
Condition
Faulty
Location
Nr 1 Engine
Part time
58,842 hours, 8,476 cycles
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT ENG FUEL VALVE MESSAGE. LEFT ENGINE: MESSAGE NOT LATCH RESET AND RAN ENG BLOW OUT FUMES, STARTED ENG NORMAL PARAMETERS NORMAL START, AT SHUT DOWN SMOKE ON THE TAIL AND FIRE ON THE TAIL PIPE FOR A SHORT TIME. REMOVED #1 ENG FMU REF AMM 73-21-01. REPLACED #1 ENG FMU REF AMM 73-21-01. OPS AND LEAK CHECK GOOD.